NDLI: Effects of magnesium deficiency on magnesium uptake activity of rice root, evaluated using $^{28}$ Mg as a tracer

Content Provider	Springer Nature Link
Author	Tai, Keitaro Kobayashi, Natsuko I. Saito, Takayuki Iwata, Naoko Kamada, Risa Iwata, Ren Suzuki, Hisashi Hirose, Atsushi Ohmae, Yoshimi Sugita, Ryohei Nakanishi, Tomoko M.
Copyright Year	2014
Abstract	The mechanisms underlying magnesium (Mg) uptake by plant roots remain to be fully elucidated. In particular, there is little information about the effects of Mg deficiency on Mg uptake activity. A Mg uptake kinetic study is essential for better understanding the Mg uptake system.We performed a Mg uptake tracer experiment in rice plants using $^{28}$ Mg.Mg uptake was mediated by high- and low-affinity transport systems. The K $_{ m }$ value of the high-affinity transport system was approximately 70 μM under Mg-deficient conditions. The Mg uptake activity was promoted by Mg deficiency, which in turn fell to the basal level after 5- min of Mg resupply. The induced uptake rate was inhibited by ionophore treatment, suggesting that an energy-dependent uptake system is enhanced by Mg deficiency.The Mg uptake changes rapidly with Mg conditions in rice, as revealed by a $^{28}$ Mg tracer experiment. This technique is expected to be applicable for Mg uptake analyses, particularly in mutants or other lines.
Starting Page	69
Ending Page	77
Page Count	9
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	384
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-07-22
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Radioisotope Kinetic study Magnesium $^{28}$ Mg Rice Uptake Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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